Journal ArticleDOI
Thermophysical Properties of Imidazolium-Based Ionic Liquids
Christopher P. Fredlake,Jacob M. Crosthwaite,Daniel G. Hert,and Sudhir N. V. K. Aki,Joan F. Brennecke +4 more
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TLDR
In this paper, the authors present density as a function of temperature, melting temperatures, glass transition temperatures, decomposition temperatures, and heat capacities for 13 ionic liquids, including 1-butyl-3-methylimidazolium trifluoromethanesulfonate.Abstract:
Ionic liquids (ILs) are salts that are liquid at low temperatures, usually including the region around room temperature. They are under intense investigation, especially as replacement solvents for reactions and separations, since they exhibit negligible vapor pressure and would not, therefore, contribute to air pollution. Clearly, basic thermophysical properties are vital for design and evaluation for these applications. We present density as a function of temperature, melting temperatures, glass-transition temperatures, decomposition temperatures, and heat capacities as a function of temperature for a series of 13 of the popular imidazolium-based ILs. The ionic liquids investigated here are 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium bromide, 1-butyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium tris(trifluoromethylsul...read more
Citations
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Incorporation of an ionic liquid into a midblock-sulfonated multiblock polymer for CO2 capture
TL;DR: In this article, hybrid block ionomer/ionic liquid (IL) membranes containing up to 40% IL were prepared by incorporating 1-butyl-3methylimidazolium tetrafluoroborate ([Bmim][BF 4 ]) into a midblock-sulfonated pentablock polymer (Nexar) that behaves as a thermoplastic elastomer.
Application of ionic liquids and microwave activation in selected organic reactions
TL;DR: Ionic liquids and microwave heating have been studied in four different reactions namely esterification, etherification and ene and sulfonylation reactions as discussed by the authors. But the results were limited by the fact that 1-Methyl-3-butylimidazolium -cations (BMIM) could not be used in basic conditions.
Journal ArticleDOI
Thermal Properties of Alkyl-triethylammonium bis{(trifluoromethyl)sulfonyl}imide Ionic Liquids
Karolina Machanová,Zdeněk Wagner,Adéla Andresová,Jan Rotrekl,Aurélien Boisset,Johan Jacquemin,Magdalena Bendová +6 more
TL;DR: In this paper, the thermal properties of selected members of a homologous series of alkyltriethylammonium bisf(trifluoromethyl)sulfonylgimide ionic liquids were studied using differential scanning calorimetry (DSC).
Journal ArticleDOI
Determination of phase transition points of ionic liquids by combination of thermal analysis and conductivity measurements at very low heating and cooling rates
TL;DR: In this article, the phase transition points of nine different ionic liquids (ILs) were determined by thermal analysis with simultaneous recording of conductivity, based on large samples, low temperature change rates and regularly repeated measurements, i.e. at least seven measurements per IL.
References
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Journal ArticleDOI
Ionic Liquids-New "Solutions" for Transition Metal Catalysis.
Peter Wasserscheid,Wilhelm Keim +1 more
TL;DR: There are indications that switching from a normal organic solvent to an ionic liquid can lead to novel and unusual chemical reactivity, which opens up a wide field for future investigations into this new class of solvents in catalytic applications.
Journal ArticleDOI
Hydrophobic, Highly Conductive Ambient-Temperature Molten Salts
Pierre Bonhote,Ana-Paula Dias,Nicholas Papageorgiou,Kuppuswamy Kalyanasundaram,Michael Grätzel +4 more
TL;DR: New, hydrophobic ionic liquids with low melting points (<−30 °C to ambient temperature) have been synthesized and investigated, based on 1,3-dialkyl imidazolium cations and hydrophilic anions and thus water-soluble.
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Characterization and comparison of hydrophilic and hydrophobic room temperature ionic liquids incorporating the imidazolium cation
Jonathan G. Huddleston,Ann E. Visser,W. Matthew Reichert,Heather D. Willauer,Grant A. Broker,Robin D. Rogers +5 more
TL;DR: A series of hydrophilic and hydrophobic 1-alkyl-3-methylimidazolium room temperature ionic liquids (RTILs) have been prepared and characterized to determine how water content, density, viscosity, surface tension, melting point, and thermal stability are affected by changes in alkyl chain length and anion.
Journal ArticleDOI
Molecular states of water in room temperature ionic liquids
TL;DR: In this paper, the authors used ATR and transmission IR spectroscopy to investigate the state of water in room temperature ionic liquids (RTILs) based on the 1-alkyl-3-methylimidazolium cation with the anions.